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Problems with AirPrint 和 AirPlay on school wireless networks

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Problems with AirPrint 和 AirPlay on school wireless networks

通过: 迈克尔·麦克纳姆 2012年10月24日 1 类别: K-12教育, 战略, 性能

苹果Airplay,学校无线网络,WiFi服务提供商,Wondering how to deploy Apple’s novel wireless networking features like AirPlay 和 AirPrint?

Well you are not alone. This challenge has been on the desk of almost every network Engineer 和 IT director across many school wireless networks since these services became available two years ago.

Educators 和 the staffs that support them have been searching for how best to implement these services on their large 和 small school wireless networks without having to redesign or reconfigure their networks to accommodate them.

这些服务面临的挑战是,它们旨在用于连接设备数量最少且域非常狭窄的小型家庭网络。介绍设备时; iPad,iPod,Apple TV,Macbook,支持AirPrint的打印机等…依赖于这些服务而进入学校无线网络,医院无线网络中的较大网络环境 and 企业无线网络 他们成为问题。

问题在于这些设备相互发现的方式。在大多数家庭中发现的小型扁平第2层网络中,这不是问题。但是,在较大的,路由的和分离的网络中,这些设备使用的服务无法运行。这些服务失败,因为它们并非旨在通过VLAN跨第3层网络或多个网段进行路由。而且由于它们本质上非常“闲谈”并会产生多余的网络流量,因此大多数网络管理员都禁用了这些广播,因此关键网络服务可以继续畅通无阻。

Programs 和 services that use these protocols to discover each other include;

  • iTunes分享
  • Apple AirPrint,学校无线网络,wifi公司,iTunes通过Wi-Fi同步
  • 空投
  • AirPrint
  • AirPlay
  • 我聊天
  • 远程桌面

When these services are allowed on a network each device makes a broadcast looking for other devices sharing files, providing print services, accepting video 和 audio content. When there are dozens, hundreds 和 even thousands of these devices on a network they create so much traffic on the network that performance is degraded due to the congestion.

Manufacturers are scrambling to find solutions to this challenge 和 some Educators have 苹果Airplay,学校无线网络,WiFi服务提供商,签署了一份请愿书,要求苹果公司对其产品进行改进以用于其网络环境。

I doubt that Apple will make much of an effort in refining the product for the enterprise wireless network or campus environment 和 I am not alone. Several vendors are already in the final steps of refining their solutions to this challenge 和 we should be seeing them soon.

这些解决方案的关键是几件事情。

  1. An efficient way to allow these broadcasts across network segments. By changing broadcasts to unicasts the traffic is minimized 和 can be routed through multiple segments.
  2. 限制一种类型的用户,同时允许另一种用户访问该服务,即阻止学生但允许教师。 (哈哈哈...没想到,如果学生在上课时劫持了AirPlay会话并拥有自己的内容会发生什么事情!!!)
  3. 个人设备意识至关重要,这样其他人就无法访问您的设备。 (另一种劫持场景)
  4. Location awareness or proximity awareness is also important. (How do you know you are accessing the right printer or Apple TV 和 not the one across the campus?)

如果您正在寻找解决方案,或者需要无线网络设计方面的帮助以正确支持这些设备,请联系我们。您可以 在这里联系我们 有任何疑问或免费咨询,或下载我们的免费无线网络设计套件以获取更多指导。

2014年4月25日更新: 苹果最近“悄悄地”发布了Apple TV固件的更新,该更新允许通过蓝牙发现Apple TV。该更新是6.1,已于上个月发布。更新的本质是消除了Apple TV与无线客户端(iPad,Mac book等)位于同一第2层网段的要求。蓝牙发现功能可以找到Apple TV并了解其MAC地址和IP地址。只要Apple TV在第3层网段上都是可访问的,无线客户端就可以将内容传输(镜像)到Apple TV。 

这是 另一篇博客文章 that summarizes the update 和 the solution it provides.

无线网络设计套件,无线服务提供商,